Abstract: An air wrench, with a compressed air motor, a wrench head and a gearing for transferring the power of the motor to the head, as well as a control mechanism, which comprises at least one adjustable pressure reducer for limiting the torque and which permits the wrench to be switched on and off manually by opening and closing a main air valve in the compressed air line to the motor of the wrench.

Abstract: An electrical appliance (10) including a motor assembly (12) and a switch assembly (14). A handle assembly (16) spans between the motor and switch assemblies (12 and 14, respectively). Lower handle (16a) includes a free end (22a) and upper handle (16b) includes a free end (22b). The free ends (22) form notches (26) which receive a wire (18) conductively coupling motor assembly (12) to switch assembly (14). Notches (26) allow for a shorter length of wire (18) and prevent abrasion and excessive bending of wire (18) during packaging and shipment.

Abstract: A head-held, pressurized fluid operated, shears unit for use in the processing of poultry and the like. The shears unit has a body member having a weight and size for ready grasp by a user. One of the cutting blades is fixed in position, and the second blade is pivotally-mounted so as to move toward and away from the first blade to effect a cutting action. The motion of the pivotal blade is effected by connecting that blade, through a pivotal linkage, to a reciprocatable piston rod that extends from a forward end of the body member. This piston rod is fastened at a second end to a double-acting piston within a piston cylinder in the body member. A master valve operated by a lever for grasp by a user directs the pressurized fluid to one of two sides of the double-acting piston so as to effect moving of the piston and piston rod and thus opening or closing the pivotal blade with respect to the fixed blade.

Abstract: A diamond cutter for use in a drill bit having a geometric size and shape normally characterized by unleached diamond product, such as STRATAPAX diamond cutters, can be fabricated by assembling a plurality of prefabricated leached polycrystalline diamond (PCD) elements in an array in a cutting slug. A cutting slug is formed of matrix material which in one embodiment is impregnated with diamond grit. The cutting face of the cutting slug is characterized by exposing at least one surface of each of the PCD elements disposed therein. The diamonds may be set within the cutting slug either in a compact touching array or in a spaced-apart relationship. More than one type of array may also be employed within a single cutting slug. The PCD elements can assume a variety of polyhedral shapes such as triangular prismatic elements, rectangular elements, hexagonal elements and the like. The plurality of diamond elements and the cutting slug are fabricated using hot pressing or infiltration techniques.

Abstract: A cold-working tool for thrusting an attached mandrel (14) partially through a hole in a metal workpiece and extracting the mandrel from the hole is disclosed. The tool comprises a pneumatic riveting gun (12) that has a body (21), a handle portion (22), and an elongate barret (24). A boss (30) is slidably retained within the outer end of the barrel. The mandrel is attached to the outermost end of the boss. The mandrel has an enlarged diameter portion (38). The riveting gun is connected to a source of pressurized air so that the impulsive forces generated by the riveting gun are transmitted through the boss to the mandrel for thrusting the mandrel through the hole. The tool also includes a housing (56) that substantially encloses the body and barrel of the gun, the housing has a forward end and a rearward end. A nose cap (72) is attached to the forward end of the housing to substantially enclose the boss with the mandrel projecting through a hole in the nose cap.

Abstract: A rock drill having a tunnel profile control system comprising a boom assembly, a converting unit for converting the position of one of positioning points on an orthogonal coordinate system representative of the transverse section of a tunnel to be driven, into a respective value on a boom coordinate system, a positioning control for positioning the boom means according to a value from the converter unit, an ultrasonic distance measuring instrument mounted on the boom assembly for determining the distance between the position point and a point on the peripheral wall defining the tunnel, and an arithmetic unit which utilizes the distance measured between the positioning point and the point on the peripheral wall defining the tunnel, the direction of travel of ultrasonic waves, and the value of the positioning point to calculate, in terms of a value in the orthogonal coordinate system, a value of a measuring point on the transverse section of the tunnel.

Abstract: This invention is a safety razor-blade holder consisting of a block of sponge-like material that is semi-rigid when dry and flacid when wet in which a conventional razor-blade assembly is implanted. The cutting edge or edges of the razor blades are preferably on or slightly below the surface of the sponge-block. When the wet sponge-block assembly is pressed lightly on the skin surface to be shaved, and moved in the direction indicated by the shape of the sponge-block, shaving occurs. It is particularly suitable for shaving arms, underarms, legs and body areas. No previous operational skill is necessary to shave satisfactorily.

Abstract: A combination comb, hair trimmer and safety razor formed from a body member, a cover plate, a handle, and a hair pick attachment. The body member has a plurality of comb teeth formed along its front edge and a recess formed in its top surface along its rear edge for receiving a razor blade. The cover plate can be received in the recess in three different orientations. In one position the device can be used for cutting hair. In a second position the device can be used for trimming hair. In its third position the device can be used as a razor. The handle can be detachably secured to either the right or left side of the body member or additionally at a perpendicular orientation to the body member. The hair pick is detachably stored within a cutout portion in the handle.

Abstract: A shaving apparatus comprises a first cutting member having a circular central body, and a second cutting member having a wall provided with hair-entry apertures, the first cutting member being associated with and rotatable relative to the second cutting member. A plurality of blades is provided for engagement with the second cutting member. A plurality of resilient blade arms respectively connects the blades to the central body, each blade arm lying in a plane inclined in the direction of rotation of the first cutting member. Each blade arm is in the form of a leaf spring and extends in its longitudinal direction radially from the central body and in its lateral direction substantially along a helix extending both in the axial direction towards the second cutting member and in the direction of rotation.

Abstract: A collar splitter for a lock bolt fastening system comprising a body having a partly tapered passage, a draw rod component slidable within the passage, and a cutter blade arrangement pivotally mounted on the draw rod component. A toggle link arrangement ensures that when the collar splitter is activated to split the relatively soft locking collar the cutter blades do not contact the relatively hard lock bolt.

Abstract: A knife to be mounted in an oscillating tool for cutting through the adhesive that fastens a window pane in place, especially in a motor vehicle. To reduce the risk of damage to its edge and to the window frame or other areas of the vehicle body, the knife has a rest made out of a soft material, especially plastic, associated with at least one side of the blade.

Abstract: Apparatus for pneumatically stamping identifying impressions on a workpiece is provided. The apparatus includes a double-acting air cylinder having a hollow piston rod. An impact piston is provided inside the barrel formed inside the piston rod to, alternatively, seal an aperture in the piston or to travel inside the barrel in order to strike a plunger mounted in a plunger housing slidably supported by the leading end of the piston rod. A stamping head having an anvil adjacent to the stamping characters is provided to be mounted on the end of the plunger housing. In operation, compressed air is injected behind the piston rod thereby extending it toward the workpiece while compressed air is provided ahead of the impact piston to retain it in seated position on an aperture in the piston of the piston rod. When the stamping characters engage the workpiece, further advancement of the piston rod closes the source of compressed air ahead of the impact piston and opens venting apertures.

Abstract: A power-screwdriver device with variable torque adjustment consists essentially of a drive mechanism, transmission, and cutoff mechanism. In order to provide a power screwdriver that is strong and inexpensive and in which the torque can be controlled with no need for a torque clutch, there is a bearing site on a transmission shaft. The bearing allows the shaft to move radially. There is a sensor that emits a motor-cutoff signal when the shaft does move radially. The radial deviation is employed as a measure of torque. The measure is adjusted with an adjusting device.

Abstract: A positive feed drill having a spindle drive gear train and a spindle feed gear train coupled to the drive gear train by side teeth on coupling gears mounted on the same shaft is provided with actuatable means for uncoupling the feed coupling gear from the drive coupling gear, and locking it when the spindle has been fed a predetermined extent, thereby retracting the spindle, and for unlocking the feed gear train, once the spindle is retracted, without recoupling it to the drive gear train, thereby holding the feed gear train in an idle mode until the automatic means is manually reset.

Abstract: A cutting tool of the ratchet operated type comprises several elements. A movable blade having a plurality of notches along the rear end thereof is moved relative to a stationary blade by an opening and closing operation of a pair of blades through a push bar which is in engagement with one of the notches. A pawl for preventing the return of the movable blade is elastically biased so as to be kept in a position disengaged from all of the notches under normal conditions. The pawl is brought into engagement with one of the notches by the push bar only when the pair of handles are fully closed relative to each other. Due to the above construction, the cutting tool according to the invention brings about reduced wear of the pawl and the notches and an easy cutting operation.

Abstract: A hair clipper comprised of a stationary blade and a movable clipper blade each provided with teeth cooperating with each other upon the reciprocating swinging movement of the clipper blade to and from the stationary blade to produce hair cut is further provided with an adjusting strip displaceable along the teeth of the stationary blade in the direction of elongation of those teeth so as to adjust the depth of the tooth gaps in the stationary blade.

Abstract: An impact screw driver which includes two changeable coupling ends of variable sizes to be inserted into differently dimensioned coupling sleeve heads of the tool bits, thereby facilitating the manufacture of the device.

Abstract: A setting device uses a driving piston for propelling fastening members into a receiving material. High pressure gases within an expansion chamber propel the driving piston through a working cylinder against a fastening element. A vent valve connects the expansion chamber with the atmosphere exterior of the setting device and, normally, the valve is maintained in the open position. A control member, located in part on the outside of the setting device, moves the vent valve into the closed position when a fastening member is to be driven.

Abstract: A power wrench operated with a pressure medium comprises a wrench head casing (10) which is engaged by a piston-cylinder unit (28,29). The other end of the piston-cylinder unit (28,29) is pressing against a support element (27) guided on a guideway (22) of the wrench head casing (10). The outer end (28) of the support element is applied to a stationary abutment. Upon rotating the wrench head (10) the ring (11) retaining the bolt or screw head is entrained by a ratchet (15) only in one sense of rotation, while the wrench head casing (10) is returned idly without entrainment of ring (11) in the other sense of rotation.

Abstract: In a machine tool such as a surface grinding machine or the like, a guide mechanism for the machine tool wherein one of a pair of opposed guideways is formed into a hydrodynamic guideway, whilst the other guideway is formed into a hydrostatic guideway, the hydrodynamic guideway is utilized as only one master guide, and on the other hand, the hydrostatic guideway is made to act in such that a moving body is pushed onto the hydrodynamic guideway with a constant pressure, so that this arrangement makes uniform the contact pressure distribution in the hydrodynamic guideway, thus the posture of the moving body is improved thereby making the same to perform precision linear motion.